{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:VCXTDHPCMBRIDG5OZSZILRSKFI","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"78ad4eaa19b2472cba9d2816ab0ac332e37e69d889e0502e079fe4c61883210e","cross_cats_sorted":["astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2021-06-18T04:22:24Z","title_canon_sha256":"8b04b2610893fa3ad4ed1d57fad4ae1280734a27b74060572770ee55b84b8655"},"schema_version":"1.0","source":{"id":"2106.09909","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2106.09909","created_at":"2026-07-05T02:53:58Z"},{"alias_kind":"arxiv_version","alias_value":"2106.09909v2","created_at":"2026-07-05T02:53:58Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2106.09909","created_at":"2026-07-05T02:53:58Z"},{"alias_kind":"pith_short_12","alias_value":"VCXTDHPCMBRI","created_at":"2026-07-05T02:53:58Z"},{"alias_kind":"pith_short_16","alias_value":"VCXTDHPCMBRIDG5O","created_at":"2026-07-05T02:53:58Z"},{"alias_kind":"pith_short_8","alias_value":"VCXTDHPC","created_at":"2026-07-05T02:53:58Z"}],"graph_snapshots":[{"event_id":"sha256:8ee2078c9c404c9e4a862a3a52593e9446f32bc1eb3ccea1be050e1462977814","target":"graph","created_at":"2026-07-05T02:53:58Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2106.09909/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We perform for the first time a 3D hydrodynamics simulation of the evolution of the last minutes pre-collapse of the oxygen shell of a fast-rotating massive star. This star has an initial mass of 38 M$_\\odot$, a metallicity of $\\sim$1/50 Z$_\\odot$, an initial rotational velocity of 600 km s$^{-1}$, and experiences chemically homogeneous evolution. It has a silicon- and oxygen-rich (Si/O) convective layer at (4.7-17)$\\times 10^{8}$ cm, where oxygen-shell burning takes place. The power spectrum analysis of the turbulent velocity indicates the dominance of the large-scale mode ($\\ell \\sim 3$), wh","authors_text":"David R. Aguilera-Dena, Hideyuki Umeda, Kei Kotake, Koh Takahashi, Ko Nakamura, Norbert Langer, Takashi Yoshida, Tomoya Takiwaki","cross_cats":["astro-ph.HE"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2021-06-18T04:22:24Z","title":"A three-dimensional hydrodynamics simulation of oxygen-shell burning in the final evolution of a fast-rotating massive star"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2106.09909","kind":"arxiv","version":2},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:7105c1fa8fbc2ef8e9e73b93386db8ca84c2edf83b924e591d1ee0e302e4c751","target":"record","created_at":"2026-07-05T02:53:58Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"78ad4eaa19b2472cba9d2816ab0ac332e37e69d889e0502e079fe4c61883210e","cross_cats_sorted":["astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2021-06-18T04:22:24Z","title_canon_sha256":"8b04b2610893fa3ad4ed1d57fad4ae1280734a27b74060572770ee55b84b8655"},"schema_version":"1.0","source":{"id":"2106.09909","kind":"arxiv","version":2}},"canonical_sha256":"a8af319de26062819baeccb285c64a2a198188805da4934262cc50e294a86438","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a8af319de26062819baeccb285c64a2a198188805da4934262cc50e294a86438","first_computed_at":"2026-07-05T02:53:58.234246Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T02:53:58.234246Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"JfX6Bx0+AZ5CgP3tIAkrwolJSKkxwPIftfIKPmVHGVxzb0aCGrFgKGpsTrpHUSVblDubKfVGVX3VO+PCV6A5Ag==","signature_status":"signed_v1","signed_at":"2026-07-05T02:53:58.234636Z","signed_message":"canonical_sha256_bytes"},"source_id":"2106.09909","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:7105c1fa8fbc2ef8e9e73b93386db8ca84c2edf83b924e591d1ee0e302e4c751","sha256:8ee2078c9c404c9e4a862a3a52593e9446f32bc1eb3ccea1be050e1462977814"],"state_sha256":"79153f2c05be9a93c6a358bb27b4469112fb89bc41775972fa5a8cc1a3d94bd9"}